John w



(No Model.)

J. W. DUNHAM.

VMACHINE POR BEVELING CLOTH BOARDS.

y N0. 257,564. l

Patented May-9, 1882.

PETERS. Phnmumegnpmr. Washington, D. c.

UnirseY STATES Aram? @erica 'd JOHN W. DUNIIAM, F ALBANY, NEV YORK.

MACHINE FOR BEVELING CLOTH-BOARDS.

SPECIFICATION forming part of Letters Patent No. 257,564, dated May '9, 1882,

Application tiled August 8,18Bl. (No model.)

To alt whom tt may concern:

. Be it known that I, JOHN IV. DUNIIAM, a citizen ot' the United States, residing at Albany, in the county ot' Albany and State of New York, have invented certain new and use' ful Improvements .in Machines for Beveling Cloth-Boards; and I d o hereby declare the following to be a full, clear, and exact description of' the invention, such as will enable others skilled in 4the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to scarring or beveling the ends of clothboards; and it consists in the construction of the parts and their combinations, by which the machine is improved.

In the drawings, Figure lrepresents an npright side view ofthe machine. Fig. 2 represents a front upright View. Fig. 3 represents a portion of Fig. 2, partly in section; and Fig. 4 represents a transverse sectional view on line y y of Fig. 2.

A represents the support of the machine.

B represents the crank-shaft, from which as it revolves motion is imparted to crankwheel B.

C is a pitman, attached at its lower end to crank-pin C in wheel B', and at its upper end is connected to the reciprocating knife-stock by a noddle-pin, C. Y

D is the head or knife stock, and is constructed so as to freely reciprocate perpendicnlarly between permanent guideways E E. The reciprocating stock D extends some distance below the knife, to have formed therein a perpendicular groove, d, and just below the knives a horizontal groove, d', to receive sliding or adjustable gages F F.

ff are adjusting-screws to adjust the gages F to any desirable point with relation to the shearing-knives and the board to be operated upon, and work through flanges at the outer ends of the gages into the edge or side ofthe knife-stock.

f f are holdin g-screlws which go through slots in the body of the gages, and thencein'to the knife-stock, to hohl the gages firmly in pla-ce when adjusted.

VGr G are inclined flanges projecting forward from the upper part of the knife-stock, and are a part of or firmly affixed thereto with their plane faces toward each other, and each one has a bolt-slot, g, through if, by which lneans the knife is adjusted thereon by boltg.

H H are the slicing-knives, made fast to the fianges G, which cause them to be a trifle farther apart at their upper ends than at their cutting-edges, and as they project from the face ot' the knife-stock they flare or become farther separated from each other, so as lo give the right bevel to the finished board'X, as seen in Fig. 4. The outer and forward cuttingedges, 7L, of knives H, in their downward reeiprocation, take hold of the wood on the side of board first, and as the knife advances down ward continues to out until the heel of the knife cuts the point ofthe board, thus produc ing a shear, and'consequently a clean cut, even when the wood is cross-grained.

I l are guiderollers, between which the board X is fed truly into the machine while resting `on any solid support; or l may be only au upright boardv against which the clothboard rests while being cut. The cloth-board being cut to the length required, the gages F F are adjusted to allow the thickness ot' the board to freely slide between them and centrally between the cut ot' the knives. When the gages are secured in that position, and the guide-rollers also adjusted, the board is forced between the rollers or roller and guide-board into groove d, the bottom of' which is on the same plane as the heel-cnt of the knives or the faccof theknitestock. lVhen in thcdownl ward recigrocation ofthe knife-stock the gages first center the upper edge ot' the board with relation to the cut ot' the knives, and as the knives continuedownward the board, whether warped, corrugated, or straight, is equally sheared on both sides, because the gages are close below the cut of the knives, and they guide the board its whole width centrally to the knives; and without these gages a bent or warped board could not be evenly cut or sheared on opposite sides. The groove d, being wider than the thickness ot the board, allows a warped or bent board to be perfectly and truly cut or sheared off on opposite sides,

as its lower edge can be :it eithel` sidc of the verging and inclined knives H, :is and for the 1o groove Without detriment to the perfect slicing purposes described.

ofthe hoard. In testimony whereofI affix my signature in Having thus described my invention, whatprcsence of two witnesses.

5 I claim iss In :i machine for scarring or lieveling cioth- JOHN WARD DUNHAM' boards, the combination of the reciprocating Witnesses: knife-stock I), having :i perpendiculargroove, HAMILTON S. DECK,

d, horizontallyndjnsmhle gages F, and the di- I WALTER B. GATES. 

